[maven-release-plugin] prepare release v1.1.8

pom.xml

 <?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
 	<modelVersion>4.0.0</modelVersion>
 
 	<groupId>org.gitlab</groupId>
 	<artifactId>java-gitlab-api</artifactId>
-	<version>1.1.8-SNAPSHOT</version>
+	<version>1.1.8</version>
 
 	<name>Gitlab Java API Wrapper</name>
 	<description>A Java wrapper for the Gitlab Git Hosting Server API</description>